A lesser-known factor when it comes to how fast you can build abs is your body type. That's why we chatted with Kyrie Furr, CPT, a certified personal trainer and performance coach with Barbend ...

Within two months, Liu saw a noticeable drop in his body fat, along with an increase ... and this is the first time in my life I've seen my abs," he said. "But I have more energy and a better ...